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mm: introduce for_each_populated_zone() macro

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Impact: cleanup

In almost cases, for_each_zone() is used with populated_zone().  It's
because almost function doesn't need memoryless node information.
Therefore, for_each_populated_zone() can help to make code simplify.

This patch has no functional change.

[[email protected]: small cleanup]
Signed-off-by: KOSAKI Motohiro <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Cc: Mel Gorman <[email protected]>
Reviewed-by: Johannes Weiner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
KOSAKI Motohiro 2009-03-31 15:19:31 -07:00 • committed by Linus Torvalds
commit ee99c71c59
6 changed files with 27 additions and 48 deletions
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11
mm/vmstat.c
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@ -135,11 +135,7 @@ static void refresh_zone_stat_thresholds(void)
int cpu;
int threshold;
for_each_zone(zone) {
if (!zone->present_pages)
continue;
for_each_populated_zone(zone) {
threshold = calculate_threshold(zone);
for_each_online_cpu(cpu)
@ -301,12 +297,9 @@ void refresh_cpu_vm_stats(int cpu)
int i;
int global_diff[NR_VM_ZONE_STAT_ITEMS] = { 0, };
for_each_zone(zone) {
for_each_populated_zone(zone) {
struct per_cpu_pageset *p;
if (!populated_zone(zone))
continue;
p = zone_pcp(zone, cpu);
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)